In Halo 3: ODST, players assume the role of the Rookie, a member of an Orbital Drop Shock Trooper squad who is lost in the war-torn, deserted Earth city of New Mombasa following a crash.

He is not alone, however. The Superintendent, the AI in charge of keeping the city running, monitors the Rookie’s progress and provides him with help, activating signs and street lights and uploading maps to his VISR database.

In 2007’s Portal, players were guided by an AI called GLaDOS. We won’t spoil it for you, but suffice it to say GLaDOS has the odd screw loose.

He said: “He’s more guiding you than anything else. When you’re walking around you’ll actually see signs change telling you what you should be doing.

“It’s always really simple. Maybe it’s just keep right with an arrow on it. Those things are happening, and it’s not really called attention to, it’s more if you’re paying attention you’ll see these things happening around you.

“It’s not really overt. So, yeah he’s doing things like placing beacons on your overhead map, but he’ll never be like, go exactly right here and do this.”